body {
  background: #0a131c url(../images/bg@2x.png) no-repeat 0 0 / cover;
  background-size: cover;
}
.header {
  position: relative;
  display: flex;
  height: 6.0938vw;
  background: url('../images/title.png') no-repeat center 1.0938vw / 24.5833vw, url('../images/编组\ 18@2x.png') 0 0 / cover;
}
.header a {
  position: absolute;
  width: 12.0313vw;
  height: 2.6042vw;
  background-color: pink;
  text-align: center;
  line-height: 2.6042vw;
  font-size: 1.25vw;
  color: #DBFAFF;
}
.header a:nth-child(1) {
  left: 7.0313vw;
  top: 2.7604vw;
  background: url('../images/矩形@2x.png') 0 0 / cover;
}
.header a:nth-child(2) {
  left: 19.6354vw;
  top: 2.7604vw;
  background: url('../images/矩形@2x.png') 0 0 / cover;
}
.header a:nth-child(3) {
  right: 19.6354vw;
  top: 2.7604vw;
  background: url('../images/矩形_1@2x.png') 0 0 / cover;
}
.header a:nth-child(4) {
  right: 7.0313vw;
  top: 2.7604vw;
  background: url('../images/矩形_1@2x.png') 0 0 / cover;
}
.header a.active {
  background: url('../images/矩形_2@2x.png') 0 0 / cover;
  color: #F7B12A;
}
.back {
  position: fixed;
  z-index: 999;
  left: 0;
  top: 1.5625vw;
  width: 4.8958vw;
  height: 2.9167vw;
  background: url('../images/返回@2x.png') 0 0 / cover;
}
